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annotate src/core/ngx_shmtx.h @ 4515:8bb695c05870 stable-1.0

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Merge of r4498: Fix of rbtree lookup on hash collisions. Previous code incorrectly assumed that nodes with identical keys are linked together. This might not be true after tree rebalance. Patch by Lanshun Zhou.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 05 Mar 2012 13:17:56 +0000
parents 4919fb357a5d
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_SHMTX_H_INCLUDED_
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9 #define _NGX_SHMTX_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef struct {
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17 #if (NGX_HAVE_ATOMIC_OPS)
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18 ngx_atomic_t *lock;
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19 #if (NGX_HAVE_POSIX_SEM)
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20 ngx_uint_t semaphore;
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21 sem_t sem;
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22 #endif
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23 #else
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24 ngx_fd_t fd;
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25 u_char *name;
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26 #endif
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27 ngx_uint_t spin;
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28 } ngx_shmtx_t;
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31 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name);
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32 void ngx_shmtx_destory(ngx_shmtx_t *mtx);
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33 ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
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34 void ngx_shmtx_lock(ngx_shmtx_t *mtx);
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35 void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
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38 #endif /* _NGX_SHMTX_H_INCLUDED_ */